Can't set virtualisation.docker.storageDriver="vfs"

I’m trying to set my docker storage driver to vfs to bypass an issue:

	# Enable docker deamon
	virtualisation.docker = {
		rootless = {
			enable = true;
			setSocketVariable = true;
		};
		storageDriver = "vfs";
	};

But this doesn’t seem to work:

> docker info | grep "Storage Driver"
 Storage Driver: overlay2